A5061778377- Chemical Looping and Thermochemical Processes
- Solar Thermal and Photovoltaic Systems
- Radiative Heat Transfer Studies
- Catalytic Processes in Materials Science
- Carbon Dioxide Capture Technologies
- Thermal Radiation and Cooling Technologies
- Adsorption and Cooling Systems
- solar cell performance optimization
- Catalysis and Oxidation Reactions
- Photovoltaic System Optimization Techniques
- Solar Radiation and Photovoltaics
- Spacecraft and Cryogenic Technologies
- Methane Hydrates and Related Phenomena
- Catalysts for Methane Reforming
- Calibration and Measurement Techniques
- CO2 Sequestration and Geologic Interactions
- Thermal and Kinetic Analysis
- Particle Dynamics in Fluid Flows
- Iron and Steelmaking Processes
- Heat and Mass Transfer in Porous Media
- Solar Energy Systems and Technologies
- Gas Dynamics and Kinetic Theory
- Nanofluid Flow and Heat Transfer
- Advancements in Solid Oxide Fuel Cells
- Thermochemical Biomass Conversion Processes
Cyprus Institute
2023-2024
Polska Grupa Energetyczna (Poland)
2004-2023
Australian National University
2013-2022
Institute of Cardiology
2022
Canberra (United Kingdom)
2016-2021
ORCID
2021
University of Minnesota
2009-2015
Twin Cities Orthopedics
2013
ETH Zurich
2006-2008
Paul Scherrer Institute
2003-2005
A thermodynamic analysis of continuous fuel production by redox cycling ceria in a single solar reactor under isothermal conditions is presented. Ceria partially reduced sweep gas flow purified nitrogen and reoxidized with either steam or carbon dioxide to produce hydrogen monoxide, respectively. The oxidizer flows are preheated the product gases. influence selected process parameters, including operating temperature, pressure, effectiveness heat recovery, on solar-to-fuel conversion...
Abstract Gold nanoparticles (GNPs) are widely used for biomedical applications due to unique optical properties, established synthesis methods, and biological compatibility. Despite important of plasmonic heating in thermal therapy, imaging, diagnostics, the lack quantification heat generation leads difficulties comparing capability new nanostructures predicting therapeutic diagnostic outcome. This study quantifies GNP by experimental measurements theoretical predictions gold nanospheres...
Reticulate porous ceramics employed in high-temperature processes are characterized for heat and mass transfer. The exact 3D digital geometry of their complex structure is obtained by computer tomography used direct pore-level simulations to numerically calculate effective transport properties. Two-point correlation functions mathematical morphology operations applied the geometrical characterization that includes determination porosity, specific surface area, representative elementary...
Heat transfer is predicted for a solid-solid heat recuperation system employed in novel directly-irradiated solar thermochemical reactor realizing metal oxide based nonstoichiometric redox cycle production of synthesis gas from water and carbon dioxide. The designed continuous operation with rotating hollow cylinder porous reactive material to counter-rotating inert solid via radiative transfer. A transient model coupling conduction, convection, radiation predicts temperatures, rates...
Stony coral morphology inspires ultra-stable sunlight absorber structure with highest reported absorptance for high-temperature solar thermal applications.
Abstract Light trapping enhancement by nanostructures is ubiquitous in engineering applications, for example, improving highly-efficient concentrating solar thermal (CST) technologies. However, most nano-engineered coatings and metasurfaces are not scalable to large surfaces ( > 100 m 2 ) unstable at elevated temperatures 850 ° C), hindering their wide-spread adoption CST. Here, we propose a layer nano-architecture that can significantly enhance the absorption of an arbitrary material....
This article reviews the progress, challenges and opportunities in heat transfer research as applied to high-temperature thermochemical systems that use high-flux solar irradiation source of process heat. Selected pertinent areas such radiative spectroscopy tomography-based mass characterization heterogeneous media, kinetics reactions, modeling systems, thermal measurements are presented, with brief discussions their methods example results from selected applications.
We present a systematic approach to the design of set high-flux solar simulators (HFSSs) for thermal, thermochemical, and materials research. The generic simulator concept consists an array identical radiation modules arranged in concentric rows. Each module short-arc lamp coupled truncated ellipsoidal specular reflector. positions are obtained based on rim angle, number rows, each row, reflector radius, spacing parameter. For fixed modules, shape is optimized with respect source-to-target...
The performance of a new high-flux solar simulator consisting 18 × 2.5 kWel radiation modules has been evaluated. Grayscale images the radiative flux distribution at focus are acquired for each module individually using water-cooled Lambertian target plate and CCD camera. Raw corrected dark current, normalized by exposure time calibrated with local absolute heat measurements to produce maps 180 µm resolution. resulting measured peak is 1.0-1.5 ± 0.2 MW m-2 per 21.7 2 sum all modules....
A novel design of a high-temperature pressurized solar air receiver for power generation via combined Brayton–Rankine cycles is proposed. It consists an annular reticulate porous ceramic (RPC) bounded by two concentric cylinders. The inner cylinder, which serves as the absorber, has cavity-type configuration and small aperture access concentrated radiation. Absorbed heat transferred conduction, radiation, convection to flowing across RPC. 2D steady-state energy conservation equation coupling...
In this paper, we present a systematic procedure to design solar simulator for high-temperature concentrated thermal and thermochemical research. The 45 kWe consists of seven identical radiation units common focus, each comprised 6.5 xenon arc lamp close-coupled precision reflector in the shape truncated ellipsoid. size is optimized by Monte Carlo ray tracing analysis achieve multiple objectives, including high transfer efficiency from lamps focal plane desired flux distribution. Based on...
A two-phase medium consisting of densely packed large nonspherical semitransparent particles in a transparent fluid is considered. Its 3D digital geometry obtained by computer tomography and employed to numerically calculate its porosity, specific surface, pore particle size distributions, the representative elementary volume for continuum domain. The collision-based Monte Carlo method applied probability distribution functions attenuation path length direction incidence at fluid-solid...